Annealing-box



J.4 H. ORWIG( ANNBALING BOX.

Patented Jan. 26, 1897l e a 9 a e @Aen s s e THE Noam Incas co. pnoouwmWASHINGTON. u. c

UNITED STATES- PATENT OFFICE.

JOHN HARRISON ORIVIG, OF ALLIANCE, OHIO.

ANNEALlNG-BOX.

SPECIFICATION forming part of Letters Patent No. 575,976, dated January26, 1897.

Application filed March 25, 1896. Serial No. 584,838. (No model.)

` Ohio, have invented certain new and useful Improvements inAnnealing-Boxes; and I do hereby declare the following to be a full,clear, and exact description of the invention, such -as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in annealing-boxes especiallyadapted for annealing large iron and steel sheets and other articles oflarge size.

Annealing-boxes of this class as heretofore constructed are liable tobecome easily warped or distorted, owing to the imperfect constructionof the boxes.

The object-s of my invention are to obviate this serious trouble and atthe same time to provide a simply-constructed and eiiicientannealing-box.

Having these ends in View my invention consists, in general terms, of aninverted-U- shaped annealing-box of any desirable width, length, andheight made of two arched plates forming the side walls and arched top,said plates butt or lap jointed longitudinally on top, flanged headsriveted to the body of the box, internal braces', and internal andexternal bracing riveted tothe bottom of the side walls and to theheads, said bracing crossing each other at the corners of the box,.allas more fully hereinafter described and particularly claimed.

My invention is illustrated in the accompanying drawings, in WhichFigure l is a perspective View; Fig. 2, a vertical transverse section,and Fig. 3 a vertical longitudinal sectional'view.

Referring to the drawings, d indicates the inverted- U shapedannealingbox; b, the straight and curved plates forming the side wallsandthe arched top. The ends of plates b, at their upper curved portion,are joined. This may be lap-jointed longitudinally, as shown in Fig. 2,or the ends may be butted together. c are internal vertical bracesriveted to the side walls and extend from near the bottom of said wallsup to the point where the plates b commence to form the arch.

These braces may be made of any desirable shape and size, but in thedrawings I have shown these braces made of standard railroadrails.

d are arch-braces made of heavy castings of iron or cast-steel, the endsof which rest on the vertical braces c and follow the contour of thearched portion ot' the box and are securely riveted thereto.

e are iiat metal bars or tie-rods running crosswise of the arch and areplaced between the arch-braces d. These cross-ties e are securelyriveted to the sides of the box, and for this purpose I employseparators f, made of angle-bars, T-bars, or other special shapes. Theheads or ends g of the box are made of a single iron or steel plate andare provided with an inWardly-projectingY flange h. The heads areriveted tothe body oi' the box, the rivets passing through the sideWalls and arch portion and the flange h. Around the bottom of the boX,on the side Walls and heads or ends, I employ longitudinal andtransverse bracing.

i' is the longitudinal bracing, made of anglebars, T-bars, or flat barsriveted to the side walls b. Transverse bracing]` is riveted to theheads g. 'Ihe longitudinal bracingz' runs along the lower edge of theside Walls, and when it is placed on the outside of the box I preferthat it should extend out a short distance beyond the side walls. Thetransverse bracing 7' extends across the heads at their lower edge andmeets the longitudinal bracing at the corners of the box. I have shownthis bracing as placed both on the inside and outside of the box. It maybe all on the outside or all on the inside without departing from thespirit of my invention.

Having thus described my invention, what I claim iS- l. Aninverted-U-shaped annealing-box, consisting of two plates forming theside Walls 'and arch, said plates longitudinally joined on top, frontand rear heads, each provided with 1 an inwardly-projecting flange andriveted to IOC) consisting of two plates forming the side Walls andarched top, said plates longitudinally joined on top, end heads eachprovided with an inwardly-projectin g flange and riveted to the body ofthe box, internal vertical braces riveted to the side Walls, arch-bracesrigidly secured to the arched portion of the box, tierods, e, betweenthe arch-braces, internal and external longitudinal and transversebraces around the bottom of the box, substantially as described.

3. An inverted-U-shaped annealing-box, consisting of two plates formingthe side Walls and arched top, said plates longitudinally joined on top,end heads, each provided with an inwardly-projecting flange and rivetedto the body of the box, internal vertical braces riveted to the sideWalls, arch-braces rigidly secured to the arched portion of the box,tierods, e, between the arch-braces, external lon- JOHN HARRISON ORWIG.

Witnesses:

ALICE FORDING, H. W. HARRIS.

